It sounds like something from a Hollywood science fiction film: a race that is half human, half ape. But leading scientists are today demanding tough new rules to prevent the nightmare scenario becoming a reality. In a hard-hitting report, they warn that research is close to pushing ‘ethical boundaries’ and that extreme attempts to give laboratory animals human attributes must be banned. While talking chimpanzees and gun-toting gorillas are currently confined to movies, the academics say the dangers of disturbing animal-human experiments are real. He added: ‘We are trying to get this out in the open before anything has happened.’...